全文获取类型
收费全文 | 392篇 |
免费 | 18篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 17篇 |
妇产科学 | 5篇 |
基础医学 | 33篇 |
口腔科学 | 9篇 |
临床医学 | 48篇 |
内科学 | 102篇 |
皮肤病学 | 13篇 |
神经病学 | 6篇 |
特种医学 | 76篇 |
外科学 | 14篇 |
综合类 | 14篇 |
预防医学 | 19篇 |
眼科学 | 2篇 |
药学 | 43篇 |
肿瘤学 | 19篇 |
出版年
2020年 | 3篇 |
2018年 | 3篇 |
2016年 | 3篇 |
2015年 | 7篇 |
2014年 | 7篇 |
2013年 | 8篇 |
2012年 | 4篇 |
2011年 | 12篇 |
2010年 | 8篇 |
2009年 | 8篇 |
2008年 | 6篇 |
2007年 | 21篇 |
2006年 | 3篇 |
2005年 | 6篇 |
2004年 | 3篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 5篇 |
2000年 | 5篇 |
1999年 | 5篇 |
1998年 | 14篇 |
1997年 | 21篇 |
1996年 | 22篇 |
1995年 | 20篇 |
1994年 | 14篇 |
1993年 | 10篇 |
1992年 | 4篇 |
1991年 | 2篇 |
1990年 | 14篇 |
1989年 | 20篇 |
1988年 | 13篇 |
1987年 | 12篇 |
1986年 | 3篇 |
1985年 | 4篇 |
1983年 | 3篇 |
1982年 | 9篇 |
1981年 | 5篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1976年 | 4篇 |
1975年 | 5篇 |
1959年 | 5篇 |
1958年 | 12篇 |
1957年 | 11篇 |
1956年 | 10篇 |
1955年 | 9篇 |
1954年 | 18篇 |
1949年 | 4篇 |
1948年 | 6篇 |
排序方式: 共有426条查询结果,搜索用时 9 毫秒
71.
The term "spontaneous gastric rupture" is used to describe our cases of neonatal gastric perforation. Nineteen such neonates are reviewed. Current opinions regarding the possible etiology is included in the discussion. Neonatal asphyxia was the most commonly seen predisposing cause in our series (63%). Roentgenograms of the abdomen are most helpful in making a positive diagnosis. Surgical repair is the treatment of choice. All the surviving patients in our series underwent surgical repair. The need for gastrostomy during surgery should be individualized. The mortality was 27% in the cases operated since 1970; a significant improvement as compared to a mortality rate of 62% for the cases operated before 1970. 相似文献
72.
GP Griffiths 《Arthroscopy》1998,14(8):836
Patellar tendinitis is a well-described clinical entity that usually responds well to conservative treatment. However, a subset of patients continue with symptoms despite exhaustive nonoperative means. The objective of the study was to review the treatment course and operative results of seven patients (eight knees) with chronic patellar tendinitis treated surgically. Five (70%) of these patients were either professional or collegiate athletes. The average age was 30 years (range, 20 to 45 years). Duration of symptoms averaged 1.4 years (range, 3 months to 4 years) before surgical correction. Operative treatment included knee arthroscopy and open repair consisting of excision of degenerated tissue and stimulation of a healing response of the patellar tendon pathology. Operative findings and pathology reports consistently showed marked fibrotendinous degeneration. Follow-up averaged 3.6 years (range, 4 months to 8.5 years). Outcomes were measured subjectively with SF36 results and objectively with Biodex testing (Biodex, Shirley, NY) and return to previous level of competition. Overall, 86% of patients achieved an excellent result and 14% had a fair result. We recommend operative intervention in a patient with chronic patellar tendinitis who does not improve with well-supervised, comprehensive conservative treatment. (Arthroscopy 1998 Nov-Dec;14(8):836-9.) 相似文献
73.
目的:通过分析精神分裂症患者中枢多巴胺代谢产物-血浆高香草酸浓度(pHVA)与临床指征的关系,进一步探讨多巴胺神经递质及其药物治疗在精神分裂症的作用。方法在46例长期药物治疗、58例未治疗精神分裂症患者中,采用高液相色谱连接电化学分析仪测定PHVA;测前评定阳性症状量表(SAPS)和阴性症状量表(SANS)。结果(1)与62例健康对照组比,治疗组PH-VA显著减低,未治疗组显著增高,以阴性症状组为 相似文献
74.
Lasseter G McNulty CA Palmer M Yoxall H Kibbler C;on behalf of the Health Protection Agency GP Microbiology Laboratory Use Group 《Mycoses》2012,55(6):476-482
The objective of this study was to investigate the management of suspected fungal nail infections by general practitioners (GPs) and determine whether guidance is sought when submitting specimens for investigation or treating cases. Questionnaires were sent to all GPs (n = 2420) served by five Health Protection Agency (HPA) collaborating laboratories in the South West of England. A total of 769 GPs responded – topical and oral antifungals were never used by 29% and 16% of GPs respectively. When antifungals were prescribed, topicals were normally given because of the severity of infection (32%); Amorolofine (53%) was the preferred choice. Oral antifungals were most often prescribed after receipt of a laboratory report (77%); Terbinafine was the preferred choice (86%). Seventy percent of GPs would only treat a suspected nail infection with oral antifungals after sending a sample for investigation, yet 27% never waited for a microscopy report before prescribing oral antifungal treatment. GPs routinely send specimens from suspected fungal nail infections for microbiological investigation, yet treatment is often prescribed before a result is received. With clinical signs of fungal infections often non‐specific, GPs should rely on laboratory results before prescribing expensive and lengthy antifungal treatments. Laboratories could further reduce antifungal use by including guidance on microscopy and culture reports. 相似文献
75.
76.
目的:通过对老年人进行血浆溶血磷脂酸和磷脂酸的筛检,从而认识血浆溶血磷脂酸和磷脂酸在血栓预防中的作用。方法:对2004-04/07期间的1657名和2005-04/07期间的1748名离休干部进行血浆溶血磷脂酸和磷脂酸含量测定,并对溶血磷脂酸>3.0μmol/L和磷脂酸>5.0μmol/L的阳性人员进行药物干预。同时,选择2004年溶血磷脂酸和/或磷脂酸阳性人员119人,随机分为两组:①干预组(n=72):男63人,女9人,平均年龄78岁。口服阿司匹林100mg/d,持续1个月。②对照组(n=47):男42人,女5人,平均年龄76岁。干预后,测定两组血浆中溶血磷脂酸和磷脂酸的含量。结果:纳入对象全部进入结果分析。2005年磷脂酸及血浆溶血磷脂酸 磷脂酸阳性率均明显低于2004年(P<0.01),尤其是磷脂酸的阳性率降低的更为明显。2005年血浆溶血磷脂酸和磷脂酸的平均值均明显低于2004年(P<0.01)。干预组干预后血浆溶血磷脂酸和磷脂酸明显低于干预前及对照组(P<0.01)。结论:①血浆溶血磷脂酸和磷脂酸的测定可作为血栓预警和了解抗血栓药物疗效的一种手段。②阿司匹林干预后,血浆溶血磷脂酸和磷脂酸的含量均降低,可作为一种降低缺血性疾病发生率的有效途径。 相似文献
77.
78.
Herpetic esophagitis 总被引:1,自引:0,他引:1
79.
Kostas G. Boboridis Nikolaos Kozeis Anastasios GP. Konstas 《Ocular immunology and inflammation》2020,28(2):188-190
ABSTRACTThis interesting study raises a scientific issue for revisiting three important elements on diagnosis, use of preservatives and selection of the appropriate topical treatment. Itchy feeling can be encountered in other ophthalmic conditions misdiagnosed as allergy, benzalkonium chloride is responsible for surface toxicity resulting in reduced efficacy and tolerability of topical allergy medications and it should be avoided on the management of ocular allergy. Unpreserved ketotifen 0,025% has been shown to be the least toxic formulation being the optimum option for efficacy and tolerability on the management of ocular allergy. 相似文献
80.
Two arterial banding prostheses were developed that could be dilated by an intraluminal balloon dilator. One prosthesis consisted of radiopaque umbilical tape with a pleat secured by four 8-0 silk sutures thinly coated with silicone type A medical adhesive. This design was used to band the main pulmonary artery in five dogs, the subclavian artery in five, and the aorta in one. The second prosthesis, a stainless steel fatigued helix encased in a siliconized shield, was used to band the main pulmonary artery in two dogs and the descending aorta in two. After a mean duration of 89 days the bands were dilated with an intraluminal balloon dilator at 6 atm (608 kPa) of pressure for 30 seconds. In all 15 experiments the bands dilated and the gradient at the band was reduced. The stainless steel helix was more successful and has technical advantages for clinical application. 相似文献